Earnings Per Share (Tables)

12 Months Ended

Dec. 31, 2014

Earnings Per Share [Abstract]

Denominator For Basic And Diluted Earnings Per Share

The denominator for basic and diluted earnings per share at December 31 is as follows:

	2014	2013	2012
Denominator for basic earnings per share—weighted-average shares	275.9	298.5	321.5
Effect of dilutive securities—employee stock options, non-vested restricted stock awards and convertible debentures	10.0	5.3	3.3
Denominator for diluted earnings per share	285.9	303.8	324.8